florescent antibodyflow velocity of water in soilflowtillfluventsfluvialfluvial depositsfluvio glacialfluxflux densityfly ashfocfoliar diagnosisfolistsfood cyclefoot slopeforest floorforest productivityformationfossil fuelfracturefragile landfragipanfragmic fabricfree acidityfree iron oxidesfree oxidesfree packing fabricfresh plant remaisfriablefrictionfriction cone penetrometerfrigidfringe waterfritted trace elementsfrost concretefrost heavingfulvic acidfulvic acid fractionfunctional nutrientfungifungistatfurrowfurrow erosionfurrow irrigationfurrow mulching
